Add --parameter-scan option and stub out CorrelationAnalyzer::parameterScan()
First round of updates for BinnedGrid refactoring
Remove BinnedData getNAxes() and getNBinsTotal() methods
Remove BinnedData::getIndex usage
Replace calls to BinnedData::getBinX methods
Update binning specs in config files for new syntax
Update parameterScan to use new grid stuff in likely
Update binning for parameter scan
* Update to use new likely features
* Add --parameter-scan option that uses the new fit parameter binning
* Changes to binning syntax are not backwards compatible
* Update binning specs in config files